As the head passes under the lower border of the symphysis pubis, which part appears first?

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Multiple Choice

As the head passes under the lower border of the symphysis pubis, which part appears first?

Explanation:
When a vertex-presenting head descends with flexion, the occiput leads because the head is flexed to present the smallest diameter through the pelvis. As the head passes under the lower border of the pubic symphysis, the occiput is the first part to emerge at the perineum, with the face and chin appearing subsequently as the head extends and the rest of the head delivers. The term vertex refers to the presenting part of the head in this scenario, not a specific part that would come first.

When a vertex-presenting head descends with flexion, the occiput leads because the head is flexed to present the smallest diameter through the pelvis. As the head passes under the lower border of the pubic symphysis, the occiput is the first part to emerge at the perineum, with the face and chin appearing subsequently as the head extends and the rest of the head delivers. The term vertex refers to the presenting part of the head in this scenario, not a specific part that would come first.

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